[update] Add Excel export functionality to DataDialog. Implement file selection and data export features, enhancing patient data management capabilities. Update pom.xml to include Apache POI dependencies for Excel handling.

pom.xml

@@ -306,6 +306,15 @@
         <artifactId>javase</artifactId>
         <version>3.5.3</version>
     </dependency>
-    
+    <dependency>
+        <groupId>org.apache.poi</groupId>
+        <artifactId>poi</artifactId>
+        <version>5.2.5</version>
+    </dependency>
+    <dependency>
+        <groupId>org.apache.poi</groupId>
+        <artifactId>poi-ooxml</artifactId>
+        <version>5.2.5</version>
+    </dependency>
   </dependencies>
 </project>

src/main/java/BsK/client/ui/component/DataDialog/DataDialog.java

@@ -21,6 +21,13 @@ import java.awt.event.WindowAdapter;
 import java.awt.event.WindowEvent;
 import java.util.Calendar;
 import java.util.Date;
+import BsK.client.ui.component.DataDialog.ExcelExporter;
+import javax.swing.filechooser.FileNameExtensionFilter;
+import java.io.File;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicReference;
 
 public class DataDialog extends JDialog {
 
@@ -38,6 +45,8 @@ public class DataDialog extends JDialog {
     private int totalPages = 1;
     private int recordsPerPage = 20;
     private int totalRecords = 0;
+    private boolean isExporting = false;
+    private File fileForExport = null;
 
     private JPanel mainPanel;
     private JPanel paginationPanel;
@@ -201,7 +210,7 @@ public class DataDialog extends JDialog {
             AddDialog addDialog = new AddDialog((Frame) getParent());
             addDialog.setVisible(true);
         });
-        exportExcelButton.addActionListener(e -> JOptionPane.showMessageDialog(this, "Chức năng xuất Excel đang được phát triển", "Thông báo", JOptionPane.INFORMATION_MESSAGE));
+        exportExcelButton.addActionListener(e -> handleExportToExcel());
         
         filterButton.addActionListener(e -> {
             saveFiltersToLocalStorage(); // <-- SAVE STATE BEFORE FETCHING
@@ -300,6 +309,31 @@ public class DataDialog extends JDialog {
 
     // --- MODIFIED: Process raw data into Patient DTOs and populate table correctly ---
     private void handleGetCheckupDataResponse(GetCheckupDataResponse response) {
+        // --- START OF MODIFICATION ---
+        // Check if we are in export mode
+        if (isExporting) {
+            List<Patient> patientsToExport = new ArrayList<>();
+            if (response.getCheckupData() != null) {
+                for (String[] rowData : response.getCheckupData()) {
+                    patientsToExport.add(new Patient(rowData));
+                }
+            }
+
+            try {
+                ExcelExporter.exportToExcel(patientsToExport, this.fileForExport);
+                JOptionPane.showMessageDialog(this, "Xuất file Excel thành công!\n" + this.fileForExport.getAbsolutePath(), "Thành công", JOptionPane.INFORMATION_MESSAGE);
+            } catch (IOException ex) {
+                JOptionPane.showMessageDialog(this, "Lỗi khi ghi file Excel: " + ex.getMessage(), "Lỗi", JOptionPane.ERROR_MESSAGE);
+            } finally {
+                // Reset the flag and file variable after exporting
+                isExporting = false;
+                fileForExport = null;
+            }
+            return; // IMPORTANT: Stop further execution to avoid updating the UI table
+        }
+        // --- END OF MODIFICATION ---
+
+        // This is your existing code for updating the table for pagination
         SwingUtilities.invokeLater(() -> {
             this.currentPage = response.getCurrentPage();
             this.totalPages = response.getTotalPages();
@@ -346,6 +380,29 @@ public class DataDialog extends JDialog {
         resultCountLabel.setText(String.format("Hiển thị %d đến %d của %d kết quả", startRecord, endRecord, totalRecords));
     }
 
+    private void handleExportToExcel() {
+        JFileChooser fileChooser = new JFileChooser();
+        fileChooser.setDialogTitle("Lưu file Excel");
+        fileChooser.setFileFilter(new FileNameExtensionFilter("Excel Workbook (*.xlsx)", "xlsx"));
+        fileChooser.setSelectedFile(new File("DanhSachKhamBenh.xlsx"));
+
+        if (fileChooser.showSaveDialog(this) == JFileChooser.APPROVE_OPTION) {
+            this.fileForExport = fileChooser.getSelectedFile();
+            // Ensure the file has a .xlsx extension
+            if (!this.fileForExport.getName().toLowerCase().endsWith(".xlsx")) {
+                this.fileForExport = new File(this.fileForExport.getParentFile(), this.fileForExport.getName() + ".xlsx");
+            }
+            
+            // Set the flag to true
+            this.isExporting = true;
+            
+            JOptionPane.showMessageDialog(this, "Đang chuẩn bị dữ liệu để xuất file...", "Thông báo", JOptionPane.INFORMATION_MESSAGE);
+            
+            // Call fetchData with a special page number (-1) to signal "get all"
+            fetchData(-1); 
+        }
+    }
+
     private void updatePaginationControls() {
         paginationPanel.removeAll();
         

src/main/java/BsK/client/ui/component/DataDialog/ExcelExporter.java

@@ -0,0 +1,69 @@
+package BsK.client.ui.component.DataDialog;
+
+import BsK.common.entity.Patient;
+import org.apache.poi.ss.usermodel.Cell;
+import org.apache.poi.ss.usermodel.Row;
+import org.apache.poi.xssf.usermodel.XSSFSheet;
+import org.apache.poi.xssf.usermodel.XSSFWorkbook;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.util.List;
+
+public class ExcelExporter {
+
+    public static void exportToExcel(List<Patient> patientList, File file) throws IOException {
+        // Create a new Excel workbook
+        try (XSSFWorkbook workbook = new XSSFWorkbook()) {
+            XSSFSheet sheet = workbook.createSheet("DanhSachKhamBenh");
+
+            // Define header titles
+            String[] headers = {
+                "Mã Khám", "Mã BN", "Họ", "Tên", "Năm Sinh", "Giới Tính", "Số Điện Thoại",
+                "Địa Chỉ", "Ngày Khám", "Loại Khám", "Bác Sĩ Khám", "CCCD/DDCN", "Cân Nặng (kg)",
+                "Chiều Cao (cm)", "Nhịp Tim (l/p)", "Huyết Áp (mmHg)", "Chẩn Đoán", "Kết Luận",
+                "Đề Nghị", "Ghi Chú", "Ngày Tái Khám"
+            };
+
+            // Create the header row
+            Row headerRow = sheet.createRow(0);
+            for (int i = 0; i < headers.length; i++) {
+                Cell cell = headerRow.createCell(i);
+                cell.setCellValue(headers[i]);
+            }
+
+            // Fill data rows
+            int rowNum = 1;
+            for (Patient patient : patientList) {
+                Row row = sheet.createRow(rowNum++);
+                row.createCell(0).setCellValue(patient.getCheckupId());
+                row.createCell(1).setCellValue(patient.getCustomerId());
+                row.createCell(2).setCellValue(patient.getCustomerLastName());
+                row.createCell(3).setCellValue(patient.getCustomerFirstName());
+                row.createCell(4).setCellValue(patient.getCustomerDob());
+                row.createCell(5).setCellValue(patient.getCustomerGender());
+                row.createCell(6).setCellValue(patient.getCustomerNumber());
+                row.createCell(7).setCellValue(patient.getCustomerAddress());
+                row.createCell(8).setCellValue(patient.getCheckupDate());
+                row.createCell(9).setCellValue(patient.getCheckupType());
+                row.createCell(10).setCellValue(patient.getDoctorName());
+                row.createCell(11).setCellValue(patient.getCccdDdcn());
+                row.createCell(12).setCellValue(patient.getCustomerWeight());
+                row.createCell(13).setCellValue(patient.getCustomerHeight());
+                row.createCell(14).setCellValue(patient.getHeartBeat());
+                row.createCell(15).setCellValue(patient.getBloodPressure());
+                row.createCell(16).setCellValue(patient.getDiagnosis());
+                row.createCell(17).setCellValue(patient.getConclusion());
+                row.createCell(18).setCellValue(patient.getSuggestion());
+                row.createCell(19).setCellValue(patient.getNotes());
+                row.createCell(20).setCellValue(patient.getReCheckupDate());
+            }
+
+            // Write the output to a file
+            try (FileOutputStream fileOut = new FileOutputStream(file)) {
+                workbook.write(fileOut);
+            }
+        }
+    }
+}

src/main/java/BsK/server/network/handler/ServerHandler.java

@@ -4,7 +4,7 @@ import BsK.common.packet.Packet;
 import BsK.common.packet.PacketSerializer;
 import BsK.common.packet.req.*;
 import BsK.common.packet.res.*;
-import BsK.common.packet.res.ErrorResponse.Error;
+import BsK.common.Error;
 import BsK.common.entity.Status;
 import BsK.common.util.date.DateUtils;
 import BsK.server.Server;